I'm still using a D70s as my primary camera, but I have to say, when Nikon released it's first camera that supported ISO 6400, they made available full resoluti

I'm still using a D70s as my primary camera, but I have to say, when Nikon released it's first camera that supported ISO 6400, they made available full resolution JPGs. You could see a bit of noise if you looked really hard for it, but, it effectively wasn't there. I can only imagine that 25,600 ISO is almost just as good as that. And, quite frankly, it's simply amazing.